Tester for electric-wiring systems.



G. B. RAYMOND. TESTER FOR ELECTRIC WIRING SYSTEMS.

APPLICATION FILED IAN- II, I9l5.

l 9 TI. 7 55GT Patented June 20, 1916.

MIQ I BY GEORGE BERT RAYMOND, 0F DAN'BURY, CONNECTICUT.

TESTER FOR ELECTRIC-WIRING SYSTEMS.

Specification of Letters Patent.

Patented June 20, 1916.

Application filed January 11, 1915. Serial No. 1.501.

To all whom e't may concern.

Be it known that I, GEORGE Bnn'r RAY- )roxo, a citizen of the l nited States, residing at Danbury, county of I airfield, State of Connecticut, have invented an Improvement in Testers for Eleetric-lVi'ring Systems, of which thefollowing is a specification. 7

This invention has for its object to provide a simple and inexpensive tester for electric wiring systems that shall be adapted for use wherever it is required to test for a broken wire or for a grounded wire or other leakage in connection with coils, dynamos, motors, telephones, lighting systems, the wiring systems of automobiles, &c., which shall be compact, requiring but little space, complete in itself, and adapted for use by persons not electrical experts.

\Vith these and other objects in view, I have devised the novel apparatus which I will now describe, referring to theaccompanying drawing and using reference characters to indicate the. several parts.

Figure 1 is aperspective view of the appa ratus complete and ready for use; Fig. 2 a detail elevation showing the battery case open; Fig. 3 a detail view showing one of the contacts attached to a piercing needle, for use in connection with insulated wires, and Fig. 1 is a view showing a pair of the pie'rcingneedles inserted in a carrier for transportation.

10 denotes a head piece provided with binding posts 11 and 12, 13 a battery, the

case 14 of which is connected to one side of the head piece and is provided with a binding post 15 insulated from the casc, and 16 a receiver attached to the other side of the head piece andinsulated therefrom.

17 denotes an electrical conductor leading from battery binding post 15 and provided with a terminal 18. A conductor 19 leads from head piece binding post 11 and is provided with a terminal 20. Conductors 17 and 19 may be inclosed in a single cable, as shown, the free end of conductor 17 being left longer than the free end of con ductor 19 so that one conductor may be readily distinguished from the other.

21 denotes a conductor leading from the receiver and provided with a terminal 22. 23 denotes a second conductor leading from the receiver and provided with a terminal 24 shown as engaging binding post 12.

It or use in connection with insulated wires or in connection with any insulation covering parts in the circuit, I provide supplemental binding posts adapted to be engaged by the terminals, as terminallS in Fig. 3, each of which is provided with a piercing needle 26. In practice, a pair of these supplemental binding posts is provided with the apparatus and carried when not in use by forcing the needles from oppositedirections into a suitable carrier 27 which may be made of cork. The battery (see Fig. 2) is preferably provided with a switch 28 by which the circuit is opened at .the battery when the apparatus is not in or a motor and the other with a wire, or both terminals may be placed in electrical contact with different portions of an engine or a machine in testing insulation, the terminals being moved in making the test until the break in the wire or the place where grounding or other leakage occurs is discovered. The use in brief is to locate a break, grounding or other defect in any kind of a wiring system. The passage of current is from the battery through conductor 17 and terminal 18 to the wire or other part being tested, andif there is no break, from said wire or part through terminal 22 and conductor 21 to the receiver, where the passage of the current will be indicated in the usual manner. The completion of the circuit is from the receiver through conductor '23, terminal 24 and the head piece to the battery. When the break, grounding or other leakage is located there will of course be no current through the apparatus and conseouently no indication at the receiver.

My novel apparatus is also adapted for use where a separate battery is not required, but the battery or other source of current in the system to be tested is utilized in detecting the, break, grounding or other leakage. Terminal 18 would now be dropped and terminal 20 used in connection with terminal 22. This cuts out battery 13 and the source of the current would be the wire or other conductor being tested. The current would be (until the break, grounding or other leakage is discovered) from the system being tested through terminal 22, conductor 21, the receiver, conductor 23, terminal 24, the head piece, conductor 19 and terminal 20 back to the system.

In testing a system using a high tension current or in testing any system where danger may-result from a high tension current through crossing of wires or any of the mishaps likely to happen, it is necessary that both the head piece and the battery be cut out. This I provide for,.leaving.the receiver only in the circuit. Conductors 17 and 19 and terminals 18 and 20 are now out of use. Terminal 2% is disconnected from binding post 12 and is used in connection with terminal 22 in the same manner that either terminal 18 or terminal 20 was used before.

Having thus described my invention I claim: I

1. A testing apparatus comprising a head piece, a battery attached to one side ot said head piece, a receiver attached to the other side of said head piece, means for establishing electrical connection between the battery and the receiver through said head piece,

and electrical connections from the battery conductor attached to said head piece to shunt said battery.

3. A testing apparatus comprising a head piece of conducting material, a battery attached to one side of said head piece and longitudinally connected therewith, a receiver attached to the other side of said head piece, binding posts attached to said head piece adjacent said battery and said receiver respectively, a conductor leading from said receiver to one of said binding posts, electrical connections from the battery and the receiver adapted to engage parts of the system to be tested, and an electrical connection leadingfrom theotherbinding post to shunt said battery.

4. A testing apparatus comprising a head piece of conducting material, a battery attached to one side of said head piece and electrically connected therewith, a receiver attached to the other side of said head piece and insulated therefrom, electrical connections from the battery and the receiver adapted to engage parts of a system to be tested, and a conductor leading. from the receiver and detachably connected with the head piece.

5. A testing apparatus comprising a head piece, a battery, a receiver, electrical con.- nections extending from the battery and the receiver and provided with terminals and supplemental binding posts adapted to be engaged by the terminals and provided with needles for piercing insulation- In testimony whereof I aflix my signature in presence of two witnesses.

GEORGE BERT RAYMOND.

Witnesses:

H. .W. MEADE. C. M. CULVER. 

